diff --git a/libraries/USB/usb_regs.c b/libraries/USB/usb_regs.c
new file mode 100644
--- /dev/null
+++ b/libraries/USB/usb_regs.c
@@ -0,0 +1,760 @@
+/**
+  ******************************************************************************
+  * @file    usb_regs.c
+  * @author  MCD Application Team
+  * @version V4.0.0
+  * @date    28-August-2012
+  * @brief   Interface functions to USB cell registers
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
+  *
+  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+  * You may not use this file except in compliance with the License.
+  * You may obtain a copy of the License at:
+  *
+  *        http://www.st.com/software_license_agreement_liberty_v2
+  *
+  * Unless required by applicable law or agreed to in writing, software 
+  * distributed under the License is distributed on an "AS IS" BASIS, 
+  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  * See the License for the specific language governing permissions and
+  * limitations under the License.
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "usb_lib.h"
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Extern variables ----------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/*******************************************************************************
+* Function Name  : SetCNTR.
+* Description    : Set the CNTR register value.
+* Input          : wRegValue: new register value.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetCNTR(uint16_t wRegValue)
+{
+  _SetCNTR(wRegValue);
+}
+
+/*******************************************************************************
+* Function Name  : GetCNTR.
+* Description    : returns the CNTR register value.
+* Input          : None.
+* Output         : None.
+* Return         : CNTR register Value.
+*******************************************************************************/
+uint16_t GetCNTR(void)
+{
+  return(_GetCNTR());
+}
+
+/*******************************************************************************
+* Function Name  : SetISTR.
+* Description    : Set the ISTR register value.
+* Input          : wRegValue: new register value.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetISTR(uint16_t wRegValue)
+{
+  _SetISTR(wRegValue);
+}
+
+/*******************************************************************************
+* Function Name  : GetISTR
+* Description    : Returns the ISTR register value.
+* Input          : None.
+* Output         : None.
+* Return         : ISTR register Value
+*******************************************************************************/
+uint16_t GetISTR(void)
+{
+  return(_GetISTR());
+}
+
+/*******************************************************************************
+* Function Name  : GetFNR
+* Description    : Returns the FNR register value.
+* Input          : None.
+* Output         : None.
+* Return         : FNR register Value
+*******************************************************************************/
+uint16_t GetFNR(void)
+{
+  return(_GetFNR());
+}
+
+/*******************************************************************************
+* Function Name  : SetDADDR
+* Description    : Set the DADDR register value.
+* Input          : wRegValue: new register value.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetDADDR(uint16_t wRegValue)
+{
+  _SetDADDR(wRegValue);
+}
+
+/*******************************************************************************
+* Function Name  : GetDADDR
+* Description    : Returns the DADDR register value.
+* Input          : None.
+* Output         : None.
+* Return         : DADDR register Value
+*******************************************************************************/
+uint16_t GetDADDR(void)
+{
+  return(_GetDADDR());
+}
+
+/*******************************************************************************
+* Function Name  : SetBTABLE
+* Description    : Set the BTABLE.
+* Input          : wRegValue: New register value.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetBTABLE(uint16_t wRegValue)
+{
+  _SetBTABLE(wRegValue);
+}
+
+/*******************************************************************************
+* Function Name  : GetBTABLE.
+* Description    : Returns the BTABLE register value.
+* Input          : None. 
+* Output         : None.
+* Return         : BTABLE address.
+*******************************************************************************/
+uint16_t GetBTABLE(void)
+{
+  return(_GetBTABLE());
+}
+
+/*******************************************************************************
+* Function Name  : SetENDPOINT
+* Description    : Set the Endpoint register value.
+* Input          : bEpNum: Endpoint Number. 
+*                  wRegValue.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetENDPOINT(uint8_t bEpNum, uint16_t wRegValue)
+{
+  _SetENDPOINT(bEpNum, wRegValue);
+}
+
+/*******************************************************************************
+* Function Name  : GetENDPOINT
+* Description    : Return the Endpoint register value.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : Endpoint register value.
+*******************************************************************************/
+uint16_t GetENDPOINT(uint8_t bEpNum)
+{
+  return(_GetENDPOINT(bEpNum));
+}
+
+/*******************************************************************************
+* Function Name  : SetEPType
+* Description    : sets the type in the endpoint register.
+* Input          : bEpNum: Endpoint Number. 
+*                  wType: type definition.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPType(uint8_t bEpNum, uint16_t wType)
+{
+  _SetEPType(bEpNum, wType);
+}
+
+/*******************************************************************************
+* Function Name  : GetEPType
+* Description    : Returns the endpoint type.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : Endpoint Type
+*******************************************************************************/
+uint16_t GetEPType(uint8_t bEpNum)
+{
+  return(_GetEPType(bEpNum));
+}
+
+/*******************************************************************************
+* Function Name  : SetEPTxStatus
+* Description    : Set the status of Tx endpoint.
+* Input          : bEpNum: Endpoint Number. 
+*                  wState: new state.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPTxStatus(uint8_t bEpNum, uint16_t wState)
+{
+  _SetEPTxStatus(bEpNum, wState);
+}
+
+/*******************************************************************************
+* Function Name  : SetEPRxStatus
+* Description    : Set the status of Rx endpoint.
+* Input          : bEpNum: Endpoint Number. 
+*                  wState: new state.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPRxStatus(uint8_t bEpNum, uint16_t wState)
+{
+  _SetEPRxStatus(bEpNum, wState);
+}
+
+/*******************************************************************************
+* Function Name  : SetDouBleBuffEPStall
+* Description    : sets the status for Double Buffer Endpoint to STALL
+* Input          : bEpNum: Endpoint Number. 
+*                  bDir: Endpoint direction.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetDouBleBuffEPStall(uint8_t bEpNum, uint8_t bDir)
+{
+  uint16_t Endpoint_DTOG_Status;
+  Endpoint_DTOG_Status = GetENDPOINT(bEpNum);
+  if (bDir == EP_DBUF_OUT)
+  { /* OUT double buffered endpoint */
+    _SetENDPOINT(bEpNum, Endpoint_DTOG_Status & ~EPRX_DTOG1);
+  }
+  else if (bDir == EP_DBUF_IN)
+  { /* IN double buffered endpoint */
+    _SetENDPOINT(bEpNum, Endpoint_DTOG_Status & ~EPTX_DTOG1);
+  }
+}
+
+/*******************************************************************************
+* Function Name  : GetEPTxStatus
+* Description    : Returns the endpoint Tx status.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : Endpoint TX Status
+*******************************************************************************/
+uint16_t GetEPTxStatus(uint8_t bEpNum)
+{
+  return(_GetEPTxStatus(bEpNum));
+}
+
+/*******************************************************************************
+* Function Name  : GetEPRxStatus
+* Description    : Returns the endpoint Rx status.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : Endpoint RX Status
+*******************************************************************************/
+uint16_t GetEPRxStatus(uint8_t bEpNum)
+{
+  return(_GetEPRxStatus(bEpNum));
+}
+
+/*******************************************************************************
+* Function Name  : SetEPTxValid
+* Description    : Valid the endpoint Tx Status.
+* Input          : bEpNum: Endpoint Number.  
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPTxValid(uint8_t bEpNum)
+{
+  _SetEPTxStatus(bEpNum, EP_TX_VALID);
+}
+
+/*******************************************************************************
+* Function Name  : SetEPRxValid
+* Description    : Valid the endpoint Rx Status.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPRxValid(uint8_t bEpNum)
+{
+  _SetEPRxStatus(bEpNum, EP_RX_VALID);
+}
+
+/*******************************************************************************
+* Function Name  : SetEP_KIND
+* Description    : Clear the EP_KIND bit.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEP_KIND(uint8_t bEpNum)
+{
+  _SetEP_KIND(bEpNum);
+}
+
+/*******************************************************************************
+* Function Name  : ClearEP_KIND
+* Description    : set the  EP_KIND bit.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void ClearEP_KIND(uint8_t bEpNum)
+{
+  _ClearEP_KIND(bEpNum);
+}
+/*******************************************************************************
+* Function Name  : Clear_Status_Out
+* Description    : Clear the Status Out of the related Endpoint
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void Clear_Status_Out(uint8_t bEpNum)
+{
+  _ClearEP_KIND(bEpNum);
+}
+/*******************************************************************************
+* Function Name  : Set_Status_Out
+* Description    : Set the Status Out of the related Endpoint
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void Set_Status_Out(uint8_t bEpNum)
+{
+  _SetEP_KIND(bEpNum);
+}
+/*******************************************************************************
+* Function Name  : SetEPDoubleBuff
+* Description    : Enable the double buffer feature for the endpoint. 
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPDoubleBuff(uint8_t bEpNum)
+{
+  _SetEP_KIND(bEpNum);
+}
+/*******************************************************************************
+* Function Name  : ClearEPDoubleBuff
+* Description    : Disable the double buffer feature for the endpoint. 
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void ClearEPDoubleBuff(uint8_t bEpNum)
+{
+  _ClearEP_KIND(bEpNum);
+}
+/*******************************************************************************
+* Function Name  : GetTxStallStatus
+* Description    : Returns the Stall status of the Tx endpoint.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : Tx Stall status.
+*******************************************************************************/
+uint16_t GetTxStallStatus(uint8_t bEpNum)
+{
+  return(_GetTxStallStatus(bEpNum));
+}
+/*******************************************************************************
+* Function Name  : GetRxStallStatus
+* Description    : Returns the Stall status of the Rx endpoint. 
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : Rx Stall status.
+*******************************************************************************/
+uint16_t GetRxStallStatus(uint8_t bEpNum)
+{
+  return(_GetRxStallStatus(bEpNum));
+}
+/*******************************************************************************
+* Function Name  : ClearEP_CTR_RX
+* Description    : Clear the CTR_RX bit.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void ClearEP_CTR_RX(uint8_t bEpNum)
+{
+  _ClearEP_CTR_RX(bEpNum);
+}
+/*******************************************************************************
+* Function Name  : ClearEP_CTR_TX
+* Description    : Clear the CTR_TX bit.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void ClearEP_CTR_TX(uint8_t bEpNum)
+{
+  _ClearEP_CTR_TX(bEpNum);
+}
+/*******************************************************************************
+* Function Name  : ToggleDTOG_RX
+* Description    : Toggle the DTOG_RX bit.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void ToggleDTOG_RX(uint8_t bEpNum)
+{
+  _ToggleDTOG_RX(bEpNum);
+}
+/*******************************************************************************
+* Function Name  : ToggleDTOG_TX
+* Description    : Toggle the DTOG_TX bit.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void ToggleDTOG_TX(uint8_t bEpNum)
+{
+  _ToggleDTOG_TX(bEpNum);
+}
+/*******************************************************************************
+* Function Name  : ClearDTOG_RX.
+* Description    : Clear the DTOG_RX bit.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void ClearDTOG_RX(uint8_t bEpNum)
+{
+  _ClearDTOG_RX(bEpNum);
+}
+/*******************************************************************************
+* Function Name  : ClearDTOG_TX.
+* Description    : Clear the DTOG_TX bit.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void ClearDTOG_TX(uint8_t bEpNum)
+{
+  _ClearDTOG_TX(bEpNum);
+}
+/*******************************************************************************
+* Function Name  : SetEPAddress
+* Description    : Set the endpoint address.
+* Input          : bEpNum: Endpoint Number.
+*                  bAddr: New endpoint address.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPAddress(uint8_t bEpNum, uint8_t bAddr)
+{
+  _SetEPAddress(bEpNum, bAddr);
+}
+/*******************************************************************************
+* Function Name  : GetEPAddress
+* Description    : Get the endpoint address.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : Endpoint address.
+*******************************************************************************/
+uint8_t GetEPAddress(uint8_t bEpNum)
+{
+  return(_GetEPAddress(bEpNum));
+}
+/*******************************************************************************
+* Function Name  : SetEPTxAddr
+* Description    : Set the endpoint Tx buffer address.
+* Input          : bEpNum: Endpoint Number.
+*                  wAddr: new address. 
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPTxAddr(uint8_t bEpNum, uint16_t wAddr)
+{
+  _SetEPTxAddr(bEpNum, wAddr);
+}
+/*******************************************************************************
+* Function Name  : SetEPRxAddr
+* Description    : Set the endpoint Rx buffer address.
+* Input          : bEpNum: Endpoint Number.
+*                  wAddr: new address.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPRxAddr(uint8_t bEpNum, uint16_t wAddr)
+{
+  _SetEPRxAddr(bEpNum, wAddr);
+}
+/*******************************************************************************
+* Function Name  : GetEPTxAddr
+* Description    : Returns the endpoint Tx buffer address.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : Rx buffer address. 
+*******************************************************************************/
+uint16_t GetEPTxAddr(uint8_t bEpNum)
+{
+  return(_GetEPTxAddr(bEpNum));
+}
+/*******************************************************************************
+* Function Name  : GetEPRxAddr.
+* Description    : Returns the endpoint Rx buffer address.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : Rx buffer address.
+*******************************************************************************/
+uint16_t GetEPRxAddr(uint8_t bEpNum)
+{
+  return(_GetEPRxAddr(bEpNum));
+}
+/*******************************************************************************
+* Function Name  : SetEPTxCount.
+* Description    : Set the Tx count.
+* Input          : bEpNum: Endpoint Number.
+*                  wCount: new count value.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPTxCount(uint8_t bEpNum, uint16_t wCount)
+{
+  _SetEPTxCount(bEpNum, wCount);
+}
+/*******************************************************************************
+* Function Name  : SetEPCountRxReg.
+* Description    : Set the Count Rx Register value.
+* Input          : *pdwReg: point to the register.
+*                  wCount: the new register value.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPCountRxReg(uint32_t *pdwReg, uint16_t wCount)
+{
+  _SetEPCountRxReg(dwReg, wCount);
+}
+/*******************************************************************************
+* Function Name  : SetEPRxCount
+* Description    : Set the Rx count.
+* Input          : bEpNum: Endpoint Number. 
+*                  wCount: the new count value.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPRxCount(uint8_t bEpNum, uint16_t wCount)
+{
+  _SetEPRxCount(bEpNum, wCount);
+}
+/*******************************************************************************
+* Function Name  : GetEPTxCount
+* Description    : Get the Tx count.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None
+* Return         : Tx count value.
+*******************************************************************************/
+uint16_t GetEPTxCount(uint8_t bEpNum)
+{
+  return(_GetEPTxCount(bEpNum));
+}
+/*******************************************************************************
+* Function Name  : GetEPRxCount
+* Description    : Get the Rx count.
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : Rx count value.
+*******************************************************************************/
+uint16_t GetEPRxCount(uint8_t bEpNum)
+{
+  return(_GetEPRxCount(bEpNum));
+}
+/*******************************************************************************
+* Function Name  : SetEPDblBuffAddr
+* Description    : Set the addresses of the buffer 0 and 1.
+* Input          : bEpNum: Endpoint Number.  
+*                  wBuf0Addr: new address of buffer 0. 
+*                  wBuf1Addr: new address of buffer 1.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPDblBuffAddr(uint8_t bEpNum, uint16_t wBuf0Addr, uint16_t wBuf1Addr)
+{
+  _SetEPDblBuffAddr(bEpNum, wBuf0Addr, wBuf1Addr);
+}
+/*******************************************************************************
+* Function Name  : SetEPDblBuf0Addr
+* Description    : Set the Buffer 1 address.
+* Input          : bEpNum: Endpoint Number
+*                  wBuf0Addr: new address.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPDblBuf0Addr(uint8_t bEpNum, uint16_t wBuf0Addr)
+{
+  _SetEPDblBuf0Addr(bEpNum, wBuf0Addr);
+}
+/*******************************************************************************
+* Function Name  : SetEPDblBuf1Addr
+* Description    : Set the Buffer 1 address.
+* Input          : bEpNum: Endpoint Number
+*                  wBuf1Addr: new address.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPDblBuf1Addr(uint8_t bEpNum, uint16_t wBuf1Addr)
+{
+  _SetEPDblBuf1Addr(bEpNum, wBuf1Addr);
+}
+/*******************************************************************************
+* Function Name  : GetEPDblBuf0Addr
+* Description    : Returns the address of the Buffer 0.
+* Input          : bEpNum: Endpoint Number.
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+uint16_t GetEPDblBuf0Addr(uint8_t bEpNum)
+{
+  return(_GetEPDblBuf0Addr(bEpNum));
+}
+/*******************************************************************************
+* Function Name  : GetEPDblBuf1Addr
+* Description    : Returns the address of the Buffer 1.
+* Input          : bEpNum: Endpoint Number.
+* Output         : None.
+* Return         : Address of the Buffer 1.
+*******************************************************************************/
+uint16_t GetEPDblBuf1Addr(uint8_t bEpNum)
+{
+  return(_GetEPDblBuf1Addr(bEpNum));
+}
+/*******************************************************************************
+* Function Name  : SetEPDblBuffCount
+* Description    : Set the number of bytes for a double Buffer 
+*                  endpoint.
+* Input          : bEpNum,bDir, wCount
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPDblBuffCount(uint8_t bEpNum, uint8_t bDir, uint16_t wCount)
+{
+  _SetEPDblBuffCount(bEpNum, bDir, wCount);
+}
+/*******************************************************************************
+* Function Name  : SetEPDblBuf0Count
+* Description    : Set the number of bytes in the buffer 0 of a double Buffer 
+*                  endpoint.
+* Input          : bEpNum, bDir,  wCount
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPDblBuf0Count(uint8_t bEpNum, uint8_t bDir, uint16_t wCount)
+{
+  _SetEPDblBuf0Count(bEpNum, bDir, wCount);
+}
+/*******************************************************************************
+* Function Name  : SetEPDblBuf1Count
+* Description    : Set the number of bytes in the buffer 0 of a double Buffer 
+*                  endpoint.
+* Input          : bEpNum,  bDir,  wCount
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void SetEPDblBuf1Count(uint8_t bEpNum, uint8_t bDir, uint16_t wCount)
+{
+  _SetEPDblBuf1Count(bEpNum, bDir, wCount);
+}
+/*******************************************************************************
+* Function Name  : GetEPDblBuf0Count
+* Description    : Returns the number of byte received in the buffer 0 of a double
+*                  Buffer endpoint.
+* Input          : bEpNum: Endpoint Number.
+* Output         : None.
+* Return         : Endpoint Buffer 0 count
+*******************************************************************************/
+uint16_t GetEPDblBuf0Count(uint8_t bEpNum)
+{
+  return(_GetEPDblBuf0Count(bEpNum));
+}
+/*******************************************************************************
+* Function Name  : GetEPDblBuf1Count
+* Description    : Returns the number of data received in the buffer 1 of a double
+*                  Buffer endpoint.
+* Input          : bEpNum: Endpoint Number.
+* Output         : None.
+* Return         : Endpoint Buffer 1 count.
+*******************************************************************************/
+uint16_t GetEPDblBuf1Count(uint8_t bEpNum)
+{
+  return(_GetEPDblBuf1Count(bEpNum));
+}
+/*******************************************************************************
+* Function Name  : GetEPDblBufDir
+* Description    : gets direction of the double buffered endpoint
+* Input          : bEpNum: Endpoint Number. 
+* Output         : None.
+* Return         : EP_DBUF_OUT, EP_DBUF_IN,
+*                  EP_DBUF_ERR if the endpoint counter not yet programmed.
+*******************************************************************************/
+EP_DBUF_DIR GetEPDblBufDir(uint8_t bEpNum)
+{
+  if ((uint16_t)(*_pEPRxCount(bEpNum) & 0xFC00) != 0)
+    return(EP_DBUF_OUT);
+  else if (((uint16_t)(*_pEPTxCount(bEpNum)) & 0x03FF) != 0)
+    return(EP_DBUF_IN);
+  else
+    return(EP_DBUF_ERR);
+}
+/*******************************************************************************
+* Function Name  : FreeUserBuffer
+* Description    : free buffer used from the application realizing it to the line
+                   toggles bit SW_BUF in the double buffered endpoint register
+* Input          : bEpNum, bDir
+* Output         : None.
+* Return         : None.
+*******************************************************************************/
+void FreeUserBuffer(uint8_t bEpNum, uint8_t bDir)
+{
+  if (bDir == EP_DBUF_OUT)
+  { /* OUT double buffered endpoint */
+    _ToggleDTOG_TX(bEpNum);
+  }
+  else if (bDir == EP_DBUF_IN)
+  { /* IN double buffered endpoint */
+    _ToggleDTOG_RX(bEpNum);
+  }
+}
+
+/*******************************************************************************
+* Function Name  : ToWord
+* Description    : merge two byte in a word.
+* Input          : bh: byte high, bl: bytes low.
+* Output         : None.
+* Return         : resulted word.
+*******************************************************************************/
+uint16_t ToWord(uint8_t bh, uint8_t bl)
+{
+  uint16_t wRet;
+  wRet = (uint16_t)bl | ((uint16_t)bh << 8);
+  return(wRet);
+}
+/*******************************************************************************
+* Function Name  : ByteSwap
+* Description    : Swap two byte in a word.
+* Input          : wSwW: word to Swap.
+* Output         : None.
+* Return         : resulted word.
+*******************************************************************************/
+uint16_t ByteSwap(uint16_t wSwW)
+{
+  uint8_t bTemp;
+  uint16_t wRet;
+  bTemp = (uint8_t)(wSwW & 0xff);
+  wRet =  (wSwW >> 8) | ((uint16_t)bTemp << 8);
+  return(wRet);
+}
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/